<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.bord{
				width: 100px;
				height: 100px;
				/*border-width: 4px;
				border-style: solid;
				border-color: blue;*/
				/*简写*/
				border: 4px solid blue;
				/*设置底*/
				/*border-bottom: 4px solid blue;*/
				
				/*边框圆角*/
				/*border-radius: 20px;*/
				border-radius: 10px 20px;
			}
		</style>
	</head>
	<body>
		<div class="bord">
			
		</div>
	</body>
</html>
